摘要
针对矿井回风喷淋换热器喷淋高度与换热效率(即落入换热器底部液滴平均温度与其温度分布标准偏差)的关系,利用FLUENT软件对矿井回风/液滴两相流进行3D仿真,采用标准k-ε模型、DPM模型和SIMPLE算法,计算出了喷淋高度分别为6、8、10、12和15 m,直径为0.15 cm,冬季制热时和夏季制冷时初始温度分别为283.15、303.15 K的液滴,逆向通过初始温度为293.15 K矿井回风落入换热器底部时获得的热量和冷量及其温度分布标准偏差。结果表明:随着喷淋高度的增加,液滴获得的热量(在冬季)和冷量(在夏季)也不断增加,但增加的幅度却逐渐减小;液滴温度分布标准偏差总体变化趋势随喷淋高度的增加而减小。综合考虑,喷淋高度选择在10 m左右最合理。
According to the spraying height and the heat exchange efficiency of the spraying heat exchanger in the mine air retuning road- way, which was the relationship between the average temperature of the liquid drop at the bottom of the heat exchanger and the deviation of the temperature distribution standard,the FLUENT software was applied to the 3D simulation on the mine retuning air and liquid drop two phase flow. The standard k-8 model, DPM model and the SIMPLE algorithm were applied to calculate the heat value, cool value and the standard deviation of the temperature distribution obtained when the spraying height was 6,8,10,12 和 15 m, the diameter drop was 0. 15 cm,when the initial temperature of the drop was 283.15 K during the heat supply in the winter season,when the initial temperature of the drop was 303.15 K during the cooling supply in the summer season,when the mine retuning air with an initial temperature of 293.15 K through the bottom of the heat exchanger. The results showed that with the spraying height increased, the heat value of the drop obtained （in winter season） and the cool value of the drop （ in summer season） also would be increased and the increasing would be steadily reduced. The general variation tendency of the drop temperature distribution standard deviation would be reduced with the spraying height in- creased. From a comprehensive consideration, the rational spraying height selected would be about 10 m.
出处
《煤炭科学技术》
CAS
北大核心
2013年第5期97-100,共4页
Coal Science and Technology
基金
中央高校基本科研业务费专项基金资助项目(2010YJ04)
北京市教育科学"十一五"规划2010年度重点资助项目(AJA10238)
关键词
矿井回风
喷淋换热器
喷淋高度
换热效率
mine air returning
spraying heat exchanger
spraying height
heat exchange efficiency
